A dot matrix cell structure, a dot matrix radiator and an energy storage device

Abstract

One or more embodiments of the present application provide a lattice cell structure, a lattice heat sink, and an energy storage device, relating to the technical field of heat sinks. The lattice cell structure includes a cell frame body and a drag reduction sheet. The interior of the cell frame body has an air outlet channel penetrating along a first set direction. The drag reduction sheet is disposed in the air outlet channel, and the side wall of the drag reduction sheet includes a wind guiding side wall. The wind guiding side wall includes a windward side wall. The windward side wall faces the air inlet end of the air outlet channel, and the two ends of the windward side wall in its extending direction are at different positions in the first set direction. This lattice cell structure can effectively reduce the windward area, effectively reduce the air flow resistance, accelerate heat transfer, improve the heat exchange effect, and significantly improve the heat dissipation performance without increasing additional energy consumption, providing a strong guarantee for the stable operation of the energy storage device.

Description

Technical Field

[0001] The present application relates to the technical field of radiators, and more specifically, to a lattice cell structure, a lattice radiator, and an energy storage device. Background Art

[0002] With the continuous development of the energy storage industry, as a core device in this field, the energy storage converter is developing towards high power and miniaturization, while also maintaining its high efficiency. This trend inevitably increases the heat generated during the operation of the device, thus posing higher requirements for the heat dissipation performance of the energy storage converter. In the energy storage converter, the power module undertakes the core task of power conversion. Therefore, the effectiveness of its heat dissipation design directly determines the reliability and stability of the entire energy storage system.

[0003] In traditional radiator designs, there are often problems such as limited heat dissipation efficiency and large flow resistance. On the one hand, with the increase in the power density of the device, traditional radiators are difficult to meet the demand for rapid heat dissipation, easily leading to excessive device temperature and affecting performance and lifespan. On the other hand, the large flow resistance not only increases the energy consumption of the heat dissipation system but may also cause noise and vibration, having an adverse impact on the operating environment and stability of the device. Summary of the Invention

[0004] One or more embodiments of the present application aim to solve or at least partially alleviate at least one problem in the related art.

[0005] One or more embodiments of the present application provide a lattice cell structure, including a cell frame main body and a drag reduction sheet. The interior of the cell frame main body has an air outlet channel penetrating along a first set direction. The drag reduction sheet is disposed in the air outlet channel, and the side wall of the drag reduction sheet includes a wind guiding side wall. The wind guiding side wall includes a windward side wall. The windward side wall faces the air inlet end of the air outlet channel, and the two ends of the windward side wall in its extending direction are respectively at different positions in the first set direction.

[0006] Compared with the related art, one or more embodiments of the present application include at least the following technical effects:

[0007] For example, for an air-cooled heat dissipation system of an energy storage system, the heat sink with this lattice cell structure forms an air outlet channel by means of the hollow design inside the cell frame body. The penetration direction of this air outlet channel, that is, the first set direction, can be the overall air outlet direction of the heat dissipation system, namely the overall air flow direction. In this way, by setting the air outlet channel inside the cell frame body, the windward area of the lattice cell structure can be cleverly reduced, effectively reducing the air flow resistance. Moreover, the presence of the drag reduction fins will also divide the air flow in the air outlet channel into multiple relatively small flow regions. The air flow velocity and direction in each region are more uniform, making it more orderly, reducing the disordered collision and turbulence of the air flow, and thus reducing the generation of turbulence and vortices. In addition, when the air flow flows on the wall surface of the cell frame body with a hollow interior, a boundary layer will be formed near the wall surface of the cell frame body; in the absence of drag reduction fins, as the air continuously flows along the surface of the cell frame body, the boundary layer will gradually thicken. When it reaches a certain extent, the kinetic energy of the air near the outer layer in the boundary layer is not sufficient to overcome the viscous force, and separation is likely to occur. The boundary layer separation will cause the air flow to become disordered, forming a large number of vortices and turbulence, which will not only increase the air flow resistance, but also reduce the heat dissipation efficiency and generate relatively large noise. However, the presence of the drag reduction fins, as mentioned above, can divide the air flow in the air outlet channel into multiple relatively small flow regions, making the air flow velocity and direction in each smaller flow region more uniform and orderly. At the same time, the air flow velocity will also be improved to a certain extent, especially the air flow velocity near the drag reduction fins will increase, causing the velocity and pressure distribution of the air flow to change when it flows through this lattice cell structure; it helps to maintain the kinetic energy of the air flow in the boundary layer at the wall surface of each flow region, and the air flow in the boundary layer is more capable of overcoming the obstruction of the viscous force and continuing to flow stably along the wall surface instead of easily separating. Finally, a relatively stable and orderly air flow state in this lattice cell structure can be maintained, further reducing the generation of turbulence and vortices in the air outlet channel, further reducing the air flow resistance and noise.

[0008] In addition, the side wall of the drag reduction fin also includes a wind guiding side wall, which can be used to provide a guiding effect on the air flow, further reducing the wind resistance; among them, the wind guiding side wall includes a windward side wall facing the air inlet end of the air outlet channel. However, the two ends of the windward side wall in its extending direction are at different positions in the first set direction, that is, the two ends of the extending direction of the windward side wall are respectively located upstream and downstream of the overall air flow direction. In this way, the incoming air flow can move from one end upstream of the windward side wall to the other end downstream, and then continue to flow backward until it flows out, so as to achieve the effect of further reducing the wind resistance.

[0009] Optionally, the side wall between the two side plate walls of the drag reduction sheet is a plate edge side wall. The drag reduction sheet is connected to one side of the cell frame body through a part of the plate edge side wall, and the drag reduction sheet is spaced from the other side of the cell frame body. Wherein, at least the air guiding side wall is included in other parts of the plate edge side wall, and one side and the other side of the cell frame body are two opposite sides of the cell frame body.

[0010] Optionally, the air guiding side wall of the drag reduction sheet further includes an air outlet side wall connected to the windward side wall. The air outlet side wall faces the air outlet end of the air outlet channel, and a peak end is formed between the windward side wall and the air outlet side wall.

[0011] Optionally, a first groove structure is provided at the windward side wall.

[0012] Optionally, the first groove structure includes a groove side wall connected to the windward side wall. The groove side wall is arranged at an obtuse angle with the adjacent windward side wall; and / or, a plurality of the first groove structures are provided, and the plurality of first groove structures are sequentially distributed along the extending direction of the windward side wall.

[0013] Optionally, the drag reduction sheet includes two side plate walls along its thickness direction, and the two side plate walls are respectively a first side plate wall and a second side plate wall. At least one of the first side plate wall and the second side plate wall is provided with a pit structure.

[0014] Optionally, when the pit structures are provided on both the first side plate wall and the second side plate wall, the pit structures on the first side plate wall and the pit structures on the second side plate wall are arranged in a staggered manner; and / or; a plurality of the pit structures are sequentially distributed along the first set direction at least at one of the first side plate wall and the second side plate wall; and / or, a plurality of the pit structures are sequentially distributed along a set inclination direction at least at one of the first side plate wall and the second side plate, wherein the set inclination direction forms an angle with the first set direction.

[0015] Optionally, the cell frame body includes a frame first side and a frame second side which are oppositely arranged. The drag reduction sheets are respectively provided on the frame first side and the frame second side. The windward side walls of the drag reduction sheets on the frame first side and the frame second side are opposite and spaced from each other.

[0016] Optionally, the direction between the two side plate walls of the drag reduction sheet is its thickness direction, and the thickness direction of the drag reduction sheet is perpendicular to the first set direction; and / or, the windward side wall is one or more combinations of a curved side wall and a flat side wall, wherein the curved side wall includes an arc-shaped side wall.

[0017] In addition, one or more embodiments of the present application provide a lattice heat sink, including the lattice cell structure as described above. A plurality of the lattice cell structures are sequentially connected along a first set direction, and along the first set direction, two adjacent drag reduction sheets are butted together to form a second groove structure.

[0018] The lattice heat sink of the present application has at least all the technical effects of the lattice cell structure, which will not be elaborated here.

[0019] In addition, one or more embodiments of the present application provide an energy storage device, including the lattice heat sink as described above.

[0020] The energy storage device of the present application has at least all the technical effects of the lattice heat sink, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present application and do not limit the present application.

[0022] Figure 1 It is a schematic structural diagram of the first lattice cell structure of the embodiment of the present application;

[0023] Figure 2 It is a front view structural diagram of the first lattice cell structure of the embodiment of the present application;

[0024] Figure 3 For Figure 2 the sectional view taken along the A-A direction;

[0025] Figure 4 It is a schematic structural diagram of the second lattice cell structure of the embodiment of the present application;

[0026] Figure 5 It is a front view structural diagram of the second lattice cell structure of the embodiment of the present application;

[0027] Figure 6 For Figure 5 the sectional view taken along the B-B direction;

[0028] Figure 7 For Figure 5 the sectional view taken along the D-D direction, wherein the direction of the dashed line n represents the set inclination direction;

[0029] Figure 8 It is a schematic structural diagram of the lattice heat sink of the embodiment of the present application;

[0030] Figure 9 It is a front view structural diagram of the lattice heat sink of the embodiment of the present application;

[0031] Figure 10 is Figure 9 a cross-sectional view in the C-C direction.

[0032] Description of reference numerals:

[0033] 1. Cell frame body; 11. First side of the frame; 12. Second side of the frame; 13. Air outlet channel; 2. Drag reduction sheet; 21. Air guiding side wall; 211. Windward side wall; 2111. First groove structure; 2112. Groove side wall; 212. Air outlet side wall; 213. Peak end; 23. Pit structure; 24. Plate surface side wall; 3. Second groove structure. Specific embodiments

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following will, in conjunction with the drawings showing multiple embodiments according to this application, clearly and completely describe the technical solutions in the embodiments of this application. It should be understood that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments described in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts will fall within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including", "comprising", "having", "possessing", "containing", "including", etc. in the specification, claims, and above-mentioned drawings of this application are open-ended terms. Therefore, a method or device "including", "comprising", "having", for example, one or more steps or elements has one or more steps or elements, but is not limited to only having these one or more elements. The terms "first", "second", etc. in the specification, claims, or above-mentioned drawings of this application are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0036] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0037] In the drawings, the Z-axis represents the vertical direction, that is, the up and down positions, and the positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side; the Y-axis in the drawings represents the horizontal direction and is specified as the left and right positions, and the positive direction of the Y-axis represents the left side, and the negative direction of the Y-axis represents the right side; the X-axis in the drawings represents the front and rear positions, and the positive direction of the X-axis represents the front side, and the negative direction of the X-axis represents the rear side. At the same time, it should be noted that the meanings represented by the foregoing Z-axis, Y-axis and X-axis are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "joined", "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] Referring to "embodiments" in the present application means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0040] As mentioned above, it should be emphasized that when the term "comprising / including" is used in this specification, it is used to clearly indicate the presence of the described features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components. As used in the present application, the singular forms "a", "an" and "the" also include the plural forms unless the context clearly indicates otherwise.

[0041] As used in this specification, the words "a" and "an" can mean one, but can also be consistent with the meaning of "at least one" or "one or more". The term "about" generally means plus or minus 10% of the recited value, or more specifically plus or minus 5%. The term "or" used in the claims means "and / or" unless clearly indicated otherwise to refer only to alternative scenarios.

[0042] In this application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0043] One or more embodiments of this application disclose a lattice cell structure. Figure 1 This is an embodiment of the first lattice cell structure provided by this application. As Figure 1 shown, the lattice cell structure includes a cell frame main body 1 and a drag reduction sheet 2. The interior of the cell frame main body 1 has an air outlet channel 13 that penetrates along a first set direction. The drag reduction sheet 2 is disposed in the air outlet channel 13, and the side wall of the drag reduction sheet 2 includes a wind guiding side wall 21. The wind guiding side wall 21 includes a windward side wall 211. The windward side wall 211 faces the air inlet end of the air outlet channel 13, and both ends of the windward side wall 211 in its extending direction are at different positions in the first set direction.

[0044] In at least one embodiment, for example, in an air-cooled heat dissipation system of an energy storage system, a radiator having this lattice cell structure forms an air outlet channel 13 by using the hollow design inside the cell frame main body 1. The penetration direction of the air outlet channel 13, that is, the first set direction, can be the overall air outlet direction of the heat dissipation system. In this way, by providing the air outlet channel 13 inside the cell frame main body 1, the windward area of the lattice cell structure can be cleverly reduced, effectively reducing the air flow resistance. Moreover, the presence of the drag reduction sheet 2 will also divide the air flow in the air outlet channel 13 into multiple relatively small flow regions. The air flow velocity and direction in each region are more uniform, making it more orderly, reducing the disordered collision and turbulence of the air flow, and thus reducing the generation of turbulence and vortices.

[0045] It should be noted that when the air flow moves along the wall surface of the main body 1 of the cell frame with internal hollowing, a boundary layer will be formed near the wall surface of the main body 1 of the cell frame; in the absence of the drag reduction sheet 2, as the air continuously flows along the surface of the main body 1 of the cell frame, the boundary layer will gradually thicken. When it reaches a certain extent, the kinetic energy of the air near the outer layer in the boundary layer is no longer sufficient to overcome the viscous force, and separation is likely to occur. The boundary layer separation will cause the air flow to become disordered, forming a large number of vortices and turbulences, which will not only increase the resistance of the air flow, but also reduce the heat dissipation efficiency and generate relatively large noise at the same time.

[0046] However, as mentioned above, the presence of the drag reduction sheet 2 can divide the air flow in the air outlet channel 13 into multiple relatively small flow regions, making the air flow velocity and direction in each smaller flow region more uniform and orderly. At the same time, the air flow velocity will also be improved to a certain extent, especially the air flow velocity near the drag reduction sheet 2 will increase, causing the velocity and pressure distribution of the air flow to change when flowing through the lattice cell structure; it helps to maintain the kinetic energy of the air flow in the boundary layer at the wall surface of each flow region, and the air flow in the boundary layer is more capable of overcoming the obstruction of the viscous force and continuing to flow stably along the wall surface instead of easily separating. Ultimately, it can maintain a relatively stable and orderly flow state of the air flow in the lattice cell structure, thereby further reducing the generation of turbulences and vortices in the air outlet channel 13, and further reducing the air flow resistance and noise.

[0047] In addition, the side wall of the drag reduction sheet 2 further includes a wind guiding side wall 21, which can be used to provide a guiding effect on the air flow and further reduce the wind resistance; wherein, the wind guiding side wall 21 includes a windward side wall 211 facing the air inlet end of the air outlet channel 13, but the two ends of the windward side wall 211 in its extending direction are at different positions in the first set direction, that is, the two ends of the extending direction of the windward side wall 211 are respectively located upstream and downstream of the overall air flow direction. In this way, the incoming air flow can move from one end upstream of the windward side wall 211 to the downstream end and then continue to flow backward until it flows out, so as to achieve the effect of further reducing the wind resistance.

[0048] In at least one embodiment, at least one side of the drag reduction sheet 2 located on the main body of the cell frame is fixedly connected to the main body of the cell frame. For example, the lower side and / or the left side / and or the right side of the drag reduction sheet 2 is fixedly connected to the main body 1 of the cell frame.

[0049] In some embodiments, as Figure 1-2 shown, the direction between the two side plate side walls 24 of the drag reduction sheet 2 is its thickness direction, and the thickness direction of the drag reduction sheet 2 is perpendicular to the first set direction.

[0050] In at least one embodiment, as Figures 1 to 3As shown, the first set direction may be the front-back direction (X-axis direction). When the thickness direction of the drag-reducing fin 2 is perpendicular to the first set direction, the thickness direction of the drag-reducing fin 2 may be the left-right direction (Y-axis direction).

[0051] In at least one embodiment, since the thickness direction of the drag-reducing fin 2 is perpendicular to the first set direction, that is, the thickness direction of the drag-reducing fin 2 is perpendicular to the overall air outlet direction of the heat dissipation system. Thus, a relatively large heat dissipation area can be increased with a relatively small increase in the windward area, accelerating heat transfer and improving the heat exchange effect. In other words, the drag-reducing fin 2 itself has a certain surface area (the area of the two side wall surfaces 24 on both sides in the thickness direction of the drag-reducing fin 2 + the area of the edge side walls between the two side wall surfaces 24). When the air flow passes through the drag-reducing fin 2, the contact area between the air and the drag-reducing fin 2 and the wall surface of the cell frame body 1 is increased, thereby improving the heat exchange effect. Without increasing additional energy consumption, the heat dissipation performance can be significantly improved, providing a strong guarantee for the stable operation of the energy storage device.

[0052] It should be noted that the "windward surface" of the lattice cell structure refers to the side surface of each component of the lattice cell structure facing the upstream of the overall air flow direction, that is, the side surface facing the air inlet end of the air outlet channel 13. That is, as Figure 2 shown, Figure 2 is Figure 1 the front view. In this front view, the visible side surfaces are all windward surfaces. Taking the drag-reducing fin 2 as an example, as shown in 1-2, when the thickness direction of the drag-reducing fin 2 is perpendicular to the first set direction, the two side wall surfaces 24 on both sides of the drag-reducing fin 2 in its thickness direction are not visible in the front view direction (the upstream direction of the air flow). That is to say, the two side wall surfaces 24 on both sides of the drag-reducing fin 2 in its thickness direction are not the windward surfaces of the drag-reducing fin 2. It can be imagined that when the thickness direction of the drag-reducing fin 2 is perpendicular to the first set direction, compared with the cell frame body 1, the drag-reducing fin 2 can increase a relatively large heat dissipation area with a relatively small increase in the windward area.

[0053] In some embodiments, it is not excluded that the thickness direction of the drag-reducing fin 2 may also form a certain angle with the first set direction. Compared with the prior art, the radiator with this lattice cell structure still has certain advantages in drag reduction and increasing the heat exchange effect, and should also fall within the protection scope of this application.

[0054] In some embodiments, as Figure 1 shown, the cell frame body 1 may be a face-centered lattice body composed of connecting beams, and each of its side surfaces is composed of four connecting beams to form two "X" shaped structures. This structure of the cell frame body 1 is not only simple to form, but also has a relatively light overall weight, and can form the air outlet channel 13 inside to reduce the windward area.

[0055] In at least one embodiment, the drag reduction sheet 2 is in contact with and connected to the connecting beams on one side of the cellular frame body 1 to form a complete lattice cell structure. Each connecting beam and the drag reduction sheet 2 can be made of aluminum alloy material, and can be manufactured by 3D printing technology to ensure the consistency of the entire lattice cell structure, thereby ensuring the uniformity and efficiency of heat conduction.

[0056] In some embodiments, as Figure 1-3 shown, the side wall between the two side plates 24 of the drag reduction sheet 2 is the edge side wall. The drag reduction sheet 2 is connected to one side of the cellular frame body 1 through a part of the edge side wall, and the drag reduction sheet 2 is spaced from the other side of the cellular frame body 1; wherein, at least part of the other part of the edge side wall includes the air guiding side wall 21, and one side and the other side of the cellular frame body 1 are the opposite sides of the cellular frame body 1.

[0057] In at least one embodiment, the drag reduction sheet 2 is fixedly connected to the cellular frame body 1 through its edge side wall, rather than through the side plate wall 24, which can ensure that the air flow in the flow area between the side plate wall 24 of the drag reduction sheet 2 and the cellular frame body 1 is not blocked, and also minimize the overall windward area of the lattice cell structure as much as possible. Specifically, the drag reduction sheet 2 is connected to one side of the cellular frame body 1 through a part of the edge side wall, while the other side of the cellular frame body 1 is spaced from the drag reduction sheet 2. In other parts of the edge side wall, at least part of the other parts includes the aforementioned air guiding side wall 21. Among them, one end of the extending direction of the windward side wall 211 (the end upstream in the overall air flow direction) can be connected to one side of the cellular frame body 1, but the other end of the extending direction of the windward side wall 211 (the end downstream in the overall air flow direction) is spaced from the cellular frame body 1. In this way, the incoming air flow can move from the upstream end to the downstream end of the windward side wall 211 and then continue to flow through the gap between the downstream end of the windward side wall 211 and the cellular frame body 1 until it flows out, so as to achieve the effect of further reducing wind resistance.

[0058] In some embodiments, the windward side wall 211 can be one or a combination of a curved side wall and a flat side wall, wherein the curved side wall includes an arc-shaped side wall.

[0059] In at least one embodiment, since the windward sidewall 211 is at different positions in the first set direction at both ends of its extending direction, that is to say, the overall extending direction of the windward sidewall 211 (the direction between both ends of the windward sidewall 211) is arranged at an angle with the first set direction, the windward sidewall 211 of the drag reduction fin 2 is not perpendicular to the overall air flow direction (the first set direction). The windward sidewall 211 is preferably a circular arc sidewall or a sidewall similar to a circular arc sidewall, and moreover, the protruding direction of the circular arc sidewall or the sidewall similar to a circular arc sidewall faces the outside of the drag reduction fin 2, that is, the drag reduction fin 2 is convex (instead of concave) at the windward sidewall 211. It can be imagined that such a windward sidewall 211 is a streamline drag reduction structure, and this streamline structure can better guide the air flow to flow along a specific direction to reduce the air flow resistance, is more conducive to optimizing the air flow field, reducing turbulence and vortices, and further achieving the purposes of drag reduction, noise reduction and heat transfer enhancement.

[0060] Specifically, the circular arc-shaped windward sidewall 211 can make the air flow transition more smoothly, slow down the change in flow velocity, avoid sudden turning of the air flow and violent fluctuations in speed, and greatly reduce the resistance generated by the violent friction and separation between the air flow and the surface of the drag reduction fin 2; after the air flow is guided by the circular arc-shaped windward sidewall 211, the entire flow state becomes more regular and orderly, avoiding local air flow congestion or disorder, and the air flow field distribution is more reasonable; the circular arc-shaped windward sidewall 211 avoids sudden obstruction or diversion of the air flow, enabling the air flowing through the front end of the lattice cell structure to flow orderly backward, which is conducive to optimizing the air flow field, reducing turbulence and vortices, and further achieving the purposes of drag reduction, noise reduction and heat transfer enhancement.

[0061] Among them, according to Bernoulli's principle, the fluid velocity and pressure are inversely proportional. The circular arc-shaped windward sidewall 211 at the front of the drag reduction fin 2 can make the process of the air flow accelerating more smooth. As the air flow accelerates along the arc, the pressure gradually decreases, avoiding the formation of a local high-pressure area at the front. If the front part is a square or other angular shape, the air flow is blocked and stagnated, forming a high-pressure point, and the subsequent pressure drops suddenly, resulting in a large resistance due to the huge pressure difference between the front and the back. The circular arc design of the windward sidewall 211 can make the pressure transition evenly from the front part to the subsequent part of the drag reduction fin 2, reducing the resistance caused by this pressure difference.

[0062] Of course, the windward sidewall 211 of the drag reduction fin 2 does not exclude being a flat sidewall, or a combination of a curved sidewall and a flat sidewall; compared with the prior art, it still has certain advantages in terms of drag reduction and heat transfer enhancement, and should also fall within the protection scope of this application.

[0063] In some embodiments, such as Figure 3As shown, the air guiding side wall 21 of the drag reduction fin 2 further includes an air outlet side wall 212 connected to the windward side wall 211. The air outlet side wall 212 faces the air outlet end of the air outlet channel 13. A peak end 213 is formed between the windward side wall 211 and the air outlet side wall 212.

[0064] In at least one embodiment, the tail part (the part close to the downstream of the air flow direction) of the drag reduction fin 2 is designed with a reduced structure. After the structure is reduced, an air outlet side wall 212 facing the air outlet end of the air outlet channel 13 is formed. And this air outlet side wall 212 is an inclined side wall, and a peak end 213 is formed between it and the windward side wall. It is equivalent to a gradual structure reduction design at the tail part of the drag reduction fin 2. Such an air outlet side wall 212 can make the fluid flow out more smoothly after flowing through this lattice cell structure, effectively reduce the wake vortex, and reduce the flow resistance. Among them, it can be understood that the peak end 213 is the peak end of the air guiding side wall 21, and it is the closest to one side of the cell frame body 1 arranged at intervals with it (as Figure 3 shown, the peak end 213 is the position on the air guiding side wall 21 closest to the upper side of the cell frame body 1). In this way, when the air flow flows along the windward side wall 211 to the peak end 213, it can flow backward between the air outlet side wall 212 and the corresponding side of the cell frame body 1.

[0065] Specifically, at the tail part of the air outlet channel 13, if there is a sudden large spatial change, the boundary layers of the wall surfaces of the drag reduction fin 2 and the cell frame body 1 are also prone to separation, and then a large number of vortices and turbulences are generated, increasing the flow resistance. Based on this, the tail reduction structure of the drag reduction fin 2 (the extending direction of the air outlet side wall 212 is arranged at an angle with the first set direction) can alleviate the separation phenomenon of the boundary layer. The gradual reduction design of the tail part of the drag reduction fin 2 can enable the fluid in the boundary layer to still have enough energy to maintain attachment to the object surface and orderly detach as the shape slowly changes, avoiding premature and violent separation to form a disordered wake, effectively reducing the wake vortex, and reducing the flow resistance. In addition, according to Bernoulli's principle, the gradual reduction design of the tail part of the drag reduction fin 2 can make the fluid velocity at the tail part of the air outlet channel 13 increase and the pressure decrease, so that the fluid can flow out more smoothly from the tail after flowing through this lattice cell structure. This not only ensures the power when the fluid flows out, but also reduces the reverse acting force caused by uneven pressure, helping to reduce the resistance.

[0066] In some embodiments, like the windward side wall 211, the air outlet side wall 212 is also one or a combination of a curved side wall and a flat side wall, wherein the curved side wall includes an arc-shaped side wall.

[0067] In at least one embodiment, both the air outlet sidewall 212 and the windward sidewall 211 are preferably arc-shaped sidewalls or sidewalls similar to arc-shaped sidewalls, so as to facilitate the better inflow and outflow of fluid into and out of the lattice cell structure. Among them, the radius of the circle where the arc of the air outlet sidewall 212 is located can be greater than the radius of the circle where the arc of the windward sidewall 211 is located, and the dimension of the air outlet sidewall 212 in its extending direction can be greater than the dimension of the windward sidewall 211 in its extending direction, which is beneficial to further reducing drag and enhancing heat transfer of the lattice cell structure.

[0068] In at least one embodiment, as Figure 1-3 shown, the main body 1 of the cell frame is integrally in a cuboid structure, and its volume is, for example: length 10 mm × width 5 mm × height 5 mm. Among them, its length dimension refers to its dimension on the X-axis, its width dimension refers to its dimension on the Y-axis, and its height dimension refers to its dimension on the Z-axis. In this spatial volume, there is enough space in the air outlet channel 13 inside the main body 1 of the cell frame to arrange the drag reduction sheet 2 with the above-mentioned shorter windward sidewall 211 and longer air outlet sidewall 212.

[0069] In some embodiments, as Figure 1 and Figure 3 shown, a first groove structure 2111 is provided at the windward sidewall 211.

[0070] In at least one embodiment, in a turbulent environment, the drag reduction effect of the windward sidewall 211 with the first groove structure 2111 is better than that of a smooth surface. The first groove structure 2111 similar to the shark skin surface can be manufactured at the windward sidewall 211 of the drag reduction sheet 2 through a precision machining process. This structure can change the air flow pattern, reduce the shear force to reduce drag, increase the surface roughness, expand the contact area with air, and promote boundary layer mixing, while further enhancing heat transfer.

[0071] It should be noted that under turbulent flow, the generation and movement of vortices are important factors leading to an increase in resistance. On a smooth wall surface, the velocity gradient of the fluid near the wall surface is relatively large, and the large velocity gradient will result in a large wall shear stress, that is, a large frictional resistance is generated. The existence of the first groove structure 2111 essentially increases the contact surface area between the drag reduction sheet 2 and the fluid, and increases the surface roughness. For the boundary layer at the windward side wall 211, the fluid velocity inside it gradually increases outward from zero at the wall surface. The design of the first groove structure 2111 breaks the velocity distribution of the conventional boundary layer, allowing some fluid to enter the first groove 2111 to form the aforementioned small-scale vortices, reducing the generation of large-scale vortices outside the boundary layer and inside the air outlet channel 13. Moreover, these small-scale vortices can supplement the kinetic energy inside the boundary layer here, making the boundary layer not easily decelerate and separate quickly due to viscous action, which is equivalent to promoting boundary layer mixing, thereby reducing the overall flow resistance of the air flow. At the same time, these minute perturbations can prompt the cold and hot fluids to mix faster, further strengthening the heat transfer.

[0072] In some embodiments, such as Figure 1 and Figure 3 As shown, the first groove structure 2111 includes a groove side wall 2112 connected to the windward side wall 211, and the groove side wall 2112 is arranged at an obtuse angle to the adjacent windward side wall 211; and / or, a plurality of the first groove structures 2111 are provided, and the plurality of first groove structures 2111 are sequentially distributed along the extension direction of the windward side wall 211. It can be understood that in the case where the windward side wall 211 is an arc-shaped side wall, the groove side wall 2112 being arranged at an obtuse angle to the adjacent windward side wall 211 means that the groove side wall 2112 is arranged at an obtuse angle to the tangent of the adjacent windward side wall 211.

[0073] In at least one embodiment, the first groove structure 2111 includes two groove side walls 2112, one is located upstream in the air flow direction, and the other is located downstream in the air flow direction. At least the groove side wall 2112 located upstream in the air flow is arranged at an obtuse angle to the adjacent windward side wall 211, so as to facilitate the air flow to enter the first groove structure 2111 along the windward side wall 211, further promoting boundary layer mixing and delaying the separation of the air flow at the boundary layer here.

[0074] Among them, the cross-sectional shape (XZ cross-sectional shape) of the first groove structure 2111 can be triangular, trapezoidal, U-shaped, etc., and there is no limitation here. The hypotenuse of the first groove structure 2111 (the aforementioned groove sidewall 2112) can guide the fluid to generate an orderly vortex, so that the low-speed fluid in the boundary layer is fully mixed with the high-speed fluid in the outer layer, effectively reducing the velocity gradient near the wall surface; the sharp edge between the groove sidewall 2112 of the first groove structure 2111 and the windward sidewall 211 can change the local velocity distribution and pressure distribution of the fluid, interfere with the formation conditions of large-scale vortices, making it difficult to form and grow near the groove, thereby reducing the energy dissipation and resistance increase caused by vortices, and further optimizing the fluid flow performance. In addition, considering from the aspects of structural strength and processing, the cross-sectional shape of the first groove structure 2111 is preferably triangular. The triangular geometry has good stability and can better withstand external pressure and friction during processing and use; moreover, in microfabrication technology, the triangular first groove structure 2111 is relatively easy to manufacture and has a lower cost.

[0075] In at least one embodiment, a plurality of first groove structures 2111 can be provided at the windward sidewall 211, and the plurality of first groove structures 2111 are arranged in sequence along the arc direction of the windward sidewall 211 to further achieve the purpose of drag reduction, noise reduction and heat transfer enhancement. Especially when the shape of the windward sidewall 211 is a circular arc sidewall or a sidewall similar to a circular arc sidewall, through the combined action of drag reduction by the streamlined structure (the drag reduction effect of the circular arc-shaped windward sidewall 211) and the drag reduction of the plurality of first groove structures 2111, the air flow field can be further optimized, the turbulent area of the air flow is reduced, the air can carry away heat more efficiently, the energy consumption is reduced, and the overall performance of the lattice radiator is improved.

[0076] Moreover, under the combined action of drag reduction by the streamlined structure (the drag reduction effect of the circular arc-shaped windward sidewall 211) and the drag reduction of the plurality of first groove structures 2111, according to Bernoulli's principle, it can better reduce the pressure drag, make the fluid velocity and pressure change continuously; it can suppress the boundary layer separation through the uniform surface pressure distribution and push back the boundary layer separation point; it can also guide the fluid to gradually change the direction and reduce the generation of vortices. In addition, the streamlined windward sidewall 211 of the structure can create a stable and orderly oncoming flow for the first groove structure 2111, enabling it to play a better role, reducing fluid turbulence and energy loss, extending the effective action range of the first groove structure 2111, and thus enhancing the overall drag reduction efficiency.

[0077] In at least one embodiment, the depth direction of each first groove structure 2111 points to the center of the windward sidewall 211. For the unity of structural design, it is convenient to design and adjust the first groove structure 2111.

[0078] In some embodiments, such as Figure 4As shown, the drag reducing sheet 2 includes two side plate surface side walls 24 along its thickness direction, and the two side plate surface side walls 24 are respectively a first plate surface side wall and a second plate surface side wall, and at least one of the first plate surface side wall and the second plate surface side wall is provided with a pit structure 23.

[0079] In at least one embodiment, at least one of the first plate surface side wall and the second plate surface side wall of the drag reducing sheet 2 is provided with a pit structure 23, and the design of the pit structure 23 can increase the heat dissipation area. In addition, by utilizing the fluid mechanics effects such as the vortex formed in the pit structure 23, the boundary layer separation can be delayed, the pressure difference resistance can be reduced, and the composite drag reduction in two dimensions can be achieved to enhance the drag reduction performance. It can be understood that the drag reduction in the first dimension refers to the drag reduction scheme of "windward side wall 211 + first groove structure 2111", and the drag reduction in the second dimension refers to the drag reduction scheme of the pit structure 23.

[0080] Among them, the relatively stable small-scale vortex flow formed inside the pit structure 23 helps to produce a vortex cushion effect (referring to the relatively stable small-scale vortex flow formed in the pit structure 23 on the surface of the drag reduction plate 2), making the velocity distribution of the fluid near the pit more complex but orderly. This ordered velocity distribution helps to reduce the separation and reattachment of the fluid, thereby reducing the pressure difference resistance. At the same time, the vortex generated by the pit structure 23 can delay the separation of the boundary layer, interfere with and decompose the large-scale disordered turbulence, and convert it into multiple small-scale, relatively regular vortices in the pit structure 23, reducing the energy dissipation caused by large-scale turbulence. The pit structure 23 can also constrain the lateral swing of the fluid, making the flow direction of the fluid along the surface of the object more stable and coherent, reducing the energy loss caused by flow deviation and shaking, and further consolidating the drag reduction effect.

[0081] By utilizing the pit structure 23 for drag reduction design in the direction perpendicular to the flow direction, drag reduction design in two dimensions, namely, the lateral direction (the second dimension direction mentioned above) and the longitudinal direction (the first dimension direction mentioned above), is achieved. By combining the drag reduction of the streamlined structure, the drag reduction of the first groove structure 2111, and the drag reduction of the spherical structure of the pit structure 23, the optimization of the lattice radiator structure is achieved, effectively improving the enhanced heat transfer and drag and noise reduction effects of the lattice radiator.

[0082] In some embodiments, both the first plate surface sidewall and the second plate surface sidewall are provided with a pit structure 23, and the pit structure 23 of the first plate surface sidewall is staggered with the pit structure 23 of the second plate surface sidewall.

[0083] In at least one embodiment, the pit structures 23 on the side walls 24 of both side surfaces of the drag reduction sheet 2 are arranged in a staggered manner rather than corresponding to each other. In this way, the pit structures 23 can be designed on the side walls 24 of both side surfaces of the drag reduction sheet 2 with a relatively thin thickness, and it will not overly affect the strength and stability of the drag reduction sheet 2 and even the entire lattice cell structure.

[0084] In some embodiments, such as Figure 4 and Figure 7 shown, a plurality of the pit structures 23 are sequentially distributed along the first set direction at at least one of the first side wall and the second side wall; and / or, a plurality of the pit structures 23 are sequentially distributed along a set inclination direction ( Figure 7 the direction of the dashed line n) at at least one of the first side wall and the second side wall, wherein the set inclination direction is set at an angle with the first set direction.

[0085] In at least one embodiment, by arranging a plurality of pit structures 23 along the first set direction on the side wall 24 of the drag reduction sheet 2, during the process of air flow, each pit structure 23 along the first set direction can achieve drag reduction, and the effects such as drag reduction can be further optimized. A plurality of pit structures 23 can also be sequentially distributed along the set inclination direction at the side wall 24 of the drag reduction sheet 2, which is equivalent to arranging a plurality of pit structures 23 sequentially in two-dimensional directions on the side wall 24, and thus the effects such as drag reduction can be further optimized.

[0086] In some embodiments, the radius of the pit structure 23 can be 0.18 mm, and, as Figure 7 shown, when a plurality of pit structures are sequentially arranged in two-dimensional directions on the side wall 24 of the drag reduction sheet 2, multiple rows of pit structures 23 will be formed vertically on the side wall 24 of the drag reduction sheet 2. The vertical distance H between two adjacent rows of pit structures 23 in the vertical direction can be 0.6 mm, and the distance S between two adjacent pit structures 23 in the X-axis direction in each row of pit structures 23 can be 1 mm; thereby further improving the effects such as drag reduction in the aforementioned second-dimensional direction while ensuring that the drag reduction sheet 2 still has a certain structural strength. Among them, as Figure 7 shown, since the inclined set direction is not perpendicular to the first set direction, under a drag reduction sheet 2 with a certain height, a relatively large number of rows of pit structures 23 can be arranged while ensuring the structural strength.

[0087] In some embodiments, such as Figures 4-7As shown, the cell frame body 1 includes a frame first side 11 and a frame second side 12 which are oppositely arranged. The drag reduction sheets 2 are respectively arranged on the frame first side 11 and the frame second side 12. The windward side wall 211 of the drag reduction sheet 2 on the frame first side 11 is opposite to and spaced from the windward side wall 211 of the drag reduction sheet 2 on the frame second side 12.

[0088] As Figures 1-3 shown, the cell frame body 1 includes a frame first side 11 and a frame second side 12 which are oppositely arranged. That is, the frame second side 12 and the frame first side 11 are the opposite sides of the cell frame body 1, which can refer to the upper and lower sides shown in the figure or the left and right sides. As mentioned above, since the drag reduction sheet 2 is connected to one side of the cell frame body 1 through a part of the plate edge side wall, and the drag reduction sheet 2 is spaced from the other side of the cell frame body 1, it is equivalent to that the drag reduction sheet 2 is connected to one of the opposite sides of the cell frame body 1 and spaced from the other of the opposite sides of the cell frame body 1. Then, in at least some embodiments, there may be at least one drag reduction sheet 2 (for example, one drag reduction sheet 2) arranged on the frame first side 11, and no drag reduction sheet 2 arranged on the frame second side 12.

[0089] In at least one set of embodiments, when there is a drag reduction sheet 2 arranged on the frame first side 11 and no drag reduction sheet 2 arranged on the frame second side 12, in the direction from the frame first side 11 to the frame second side 12, the size of the drag reduction sheet 2 is 85% to 95% of the size of the air outlet channel 13, for example, 90%, so as to increase the heat dissipation area as much as possible without affecting the drag reduction effect of the drag reduction sheet 2.

[0090] As mentioned above, since the drag reduction sheet 2 is connected to one side of the cell frame body 1 through a part of the plate edge side wall, and the drag reduction sheet 2 is spaced from the other side of the cell frame body 1, it is equivalent to that the drag reduction sheet 2 is connected to one of the opposite sides of the cell frame body 1 and spaced from the other of the opposite sides of the cell frame body 1. Then, as Figures 4-7 shown, in at least some embodiments, there may be at least one drag reduction sheet 2 (for example, one drag reduction sheet 2) arranged on the frame first side 11, and at least one drag reduction sheet 2 (for example, one drag reduction sheet 2) also arranged on the frame second side 12.

[0091] In at least one embodiment, when the drag reduction fins 2 are provided on both the first side 11 and the second side 12 of the frame, the windward side walls 211 of the drag reduction fins 2 on the first side 11 of the frame are opposite to and spaced from the windward side walls 211 of the drag reduction fins 2 on the second side 12 of the frame, that is, the drag reduction fins 2 on the first side 11 of the frame and the drag reduction fins 2 on the second side 12 of the frame are symmetrically arranged. The strength, stability and reliability of this lattice cell structure are higher. This lattice cell structure and lattice radiator can operate stably for a long time in a complex environment, reduce the failure probability and maintenance time cost of the energy storage system, and provide a solid guarantee for the stable operation of the energy storage device. Moreover, when the drag reduction fins 2 are provided on both the first side 11 and the second side 12 of the frame, in the direction from the first side 11 to the second side 12 of the frame, the sum of the sizes of the drag reduction fins 2 on the first side 11 and the second side 12 of the frame is 70% to 90% of the size of the air outlet channel 13, for example 80%, and the sizes of the drag reduction fins 2 on the first side 11 and the second side 12 of the frame are respectively 35% to 45% of the size of the air outlet channel 13, for example 40%. While increasing the heat dissipation area as much as possible, the drag reduction effect and the stability of the structure are further improved. Among them, for the case where the drag reduction fins 2 are provided on both the first side 11 and the second side 12 of the frame, since the size of each drag reduction fin 2 is relatively small, it is easier to arrange the windward side wall 211 and the air outlet side wall 212 with a certain extension dimension and better air guiding arc.

[0092] In at least one embodiment, the thickness of the drag reduction fin 2 can be 0.5 mm on average; when the drag reduction fin 2 is provided on one side of the opposite sides of the cell frame body 1, the depth of the first groove structure 2111 of the drag reduction fin 2 can be 0.75 mm, and the angle between the two groove side walls 2112 of the cross-sectional triangle of the first groove structure 2111 is, for example, 60°; when the drag reduction fins 2 are provided on both opposite sides of the cell frame body 1, the depth of the first groove structure 2111 of the drag reduction fin 2 can be 0.25 mm. Finally, the drag reduction and other effects can be further improved in the first dimension direction.

[0093] In addition, one or more embodiments of the present application provide a lattice radiator, see Figures 8 to 10 , the lattice radiator includes the lattice cell structure as described above, and a plurality of the lattice cell structures are sequentially connected along a first set direction, and along the first set direction, adjacent two drag reduction fins 2 are butted together to form a second groove structure 3.

[0094] In at least one embodiment, in addition to having all the technical effects of the lattice cell structure, the lattice radiator, as Figure 10As shown, in this dot matrix radiator, except for the first groove structure 2111 at the windward side wall 211 in front of the drag reduction fin 2, a relatively large second groove structure 3 can be formed between the air outlet side wall 212 at the tail of the previous drag reduction fin 2 and the windward side wall 211 at the front of the next drag reduction fin 2. For the two sizes of groove structures, the smaller first groove structure 2111 at the front end can initially comb and guide the fluid entering the radiator; due to its small size, it can generate relatively fine flow field adjustment, such as guiding the fluid to generate small-scale vortices, so that the fluid forms a relatively stable boundary layer in the area close to the radiator wall surface, reducing the wall shear stress and thus reducing the frictional resistance. The slightly larger second groove structure 3 can accommodate more fluid, making the flow velocity distribution of the fluid in it more uniform and reducing the resistance caused by sudden changes in flow velocity.

[0095] In summary, this radiator adopts a dot matrix structure with a large interface area of the heat conduction path. The high thermal conductivity aluminum alloy material can accelerate heat transfer, which is more beneficial for efficient heat conduction in forced air cooling. The internal drag reduction fins 2 are designed based on the principles of streamlined drag reduction, smaller groove drag reduction, larger groove drag reduction, and pit drag reduction to achieve composite drag reduction, effectively reducing the internal wind resistance and improving the air cooling effect. When the heat dissipation system of the energy storage system is operating, the radiator that enhances heat dissipation and reduces drag can reduce the energy consumption of the fan, reduce losses, extend the service life, reduce noise, save operation and maintenance costs, and improve economy and practicability. Energy storage devices usually need to achieve high energy density storage in a limited space. The dot matrix radiator with efficient heat dissipation and drag reduction in forced air cooling can achieve efficient heat dissipation in a smaller space, which is beneficial for the compact design of the energy storage system.

[0096] In addition, one or more embodiments of the present application provide an energy storage device including the dot matrix radiator described above. The dot matrix energy storage device at least has all the technical effects of the dot matrix radiator, which will not be elaborated here.

[0097] The basic principles, main features, and advantages of the present application have been described above. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A lattice cell structure, characterized in that: It includes a cell frame body and a drag reduction sheet, the interior of the cell frame body has an air outlet channel passing through along a first set direction, the drag reduction sheet is arranged in the air outlet channel, and the side wall of the drag reduction sheet includes a wind-guiding side wall, the wind-guiding side wall includes a windward side wall, the windward side wall faces the air inlet end of the air outlet channel, and the two ends of the windward side wall in its extension direction are respectively at different positions in the first set direction; the direction of the drag reduction sheet between the plate side walls on both sides is its thickness direction, and the thickness direction of the drag reduction sheet is perpendicular to the first set direction; a first groove structure is arranged at the windward side wall; the drag reduction sheet includes plate side walls on both sides along its thickness direction, and the plate side walls on both sides are respectively a first plate side wall and a second plate side wall, and at least one of the first plate side wall and the second plate side wall is provided with a pit structure.

2. The lattice cell structure according to claim 1, characterized in that: The side wall of the drag reducing sheet between the side walls of the plate surface on both sides is a plate edge side wall, the drag reducing sheet is connected to one side of the cell frame body through a portion of the plate edge side wall, and the drag reducing sheet is spaced apart from the other side of the cell frame body; wherein the other portions of the plate edge side wall include at least the wind guide side wall, and one side and the other side of the cell frame body are two opposite sides of the cell frame body.

3. The lattice cell structure according to claim 1, characterized in that: The wind-guiding side wall of the drag-reducing sheet further comprises an air outlet side wall connected to the windward side wall, the air outlet side wall faces the air outlet end of the air outlet channel, and a peak end is formed between the windward side wall and the air outlet side wall.

4. The lattice cell structure according to claim 1, characterized in that: The first groove structure includes a groove sidewall connected to the windward sidewall, and the groove sidewall is set at an obtuse angle to the adjacent windward sidewall; and / or, there are multiple first groove structures, and the multiple first groove structures are distributed in sequence along the extension direction of the windward sidewall.

5. The lattice cell structure according to claim 1, characterized in that: In the case where both the first plate surface side wall and the second plate surface side wall are provided with the pit structure, the pit structure of the first plate surface side wall and the pit structure of the second plate surface side wall are arranged in a staggered manner; and / or; a plurality of the pit structures are sequentially distributed along the first set direction at at least one of the first plate surface side wall and the second plate; And / or, the plurality of pit structures are sequentially distributed along a set inclined direction on at least one of the first plate surface side wall and the second plate surface side wall, wherein the set inclined direction is arranged at an angle to the first set direction.

6. The lattice cell structure according to any one of claims 2 to 5, characterized in that: The cell frame body includes a first frame side and a second frame side that are arranged opposite to each other, and the first frame side and the second frame side are respectively provided with the drag reduction sheet, and the windward side wall of the drag reduction sheet on the first frame side is opposite to the windward side wall of the drag reduction sheet on the second frame side and is arranged at intervals.

7. The lattice cell structure according to any one of claims 1 to 6, characterized in that: The windward side wall is one or more combinations of a curved side wall and a flat side wall, wherein the curved side wall includes an arc-shaped side wall.

8. A lattice radiator, characterized in that: It comprises the lattice cell structure as described in any one of claims 1 to 7, wherein a plurality of the lattice cell structures are sequentially connected along a first set direction, and along the first set direction, two adjacent drag reduction sheets are butted together to form a second groove structure.

9. An energy storage device, characterized in that: It comprises the lattice radiator as claimed in claim 8.

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